The problem, of man falls into a category of problems of human knowledge that are both ‘eternal’ and ever new. Countless legends, myths, philosophical systems, religious doctrines, scientific conceptions and fantastic visions have been the fruit of man's ungovernable desire to know himself, to know his essence, his purpose in the world, his fate, his future. Not to mention the ingenious hypotheses and Utopian fantasms, scientific truths and galling mistakes, bold projects and cowardly superstitions handed on by human civilization in its Indefatigable search for the ‘magic crystal’ which would at last reveal man's true nature. All periods have made their contribution In this everlasting quest and all have relied on the few parcels of truth gleaned by humanity at earlier stages of development. Our times, the most dramatic and revolutionary of all, are by no means an exception and can be distinguished from the rest only by the exceptional acuity and urgency of the problem.